Quiz on Classification of Creams with Flashcards

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Questions and Answers

What is the characteristic of Moisturizing creams in terms of oil content?

No oil content

Medium-to-high oil content

High oil content

Low oil content (correct)

What type of pH is typically found in Foundation creams?

Highly acidic

Variable pH

Highly alkaline

Neutral to slightly acidic (correct)

Which type of cream is likely to be stiff and 'rich'?

Foundation creams

Cold creams (correct)

Moisturizing creams

Cleansing creams

What is the characteristic of Hand and Body creams in terms of spreadability?

Easily spreadable but do not 'rub in' Signup and view all the answers

What type of emulsion is usually found in Foundation creams?

Oil-in-water emulsion Signup and view all the answers

What is the purpose of surfactants in Cleansing creams?

To improve penetration and suspension properties Signup and view all the answers

Which type of cream is available in both cream and lotion forms?

Hand and Body creams Signup and view all the answers

What is the characteristic of Cleansing creams in terms of oil content?

Medium-to-high oil content Signup and view all the answers

What is the primary reason for using non-ionic emulsifiers in beeswax-borax emulsions?

To add flexibility and stability to the emulsion Signup and view all the answers

What type of emulsion is formula (1) in the content?

Water-in-oil (W/O) emulsion Signup and view all the answers

Why are buffered acidic cleansing creams preferred?

They allow a more rapid return to normal skin pH Signup and view all the answers

What is the purpose of 2-Night and Massage Creams?

To be left on the skin for several hours Signup and view all the answers

What is the common use of triethanolamine stearate emulsifier systems?

In cleansing creams Signup and view all the answers

What is the characteristic of lighter creams of the oil-in-water type?

Medium oil content Signup and view all the answers

What is the common use of glyceryl stearates?

In acidic formulations Signup and view all the answers

Why may phase inversion occur on the skin after application?

When the emulsion is spread onto the skin surface and the water begins to evaporate Signup and view all the answers

What is the primary purpose of cleansing creams and lotions on the skin surface?

To efficiently and pleasantly remove grime and soil Signup and view all the answers

What is the characteristic of cleansing creams that makes them more effective than water or soap alone?

Their ability to emulsify and suspend grime and soil Signup and view all the answers

What is the term for a group of emulsions that are related to cleansing creams and are characterized by their cooling effect on the skin?

Cold creams Signup and view all the answers

What is the role of borax in the formulation of cold creams?

To increase the stability of the emulsion Signup and view all the answers

What is the characteristic of cleansing creams that makes them more convenient to use than soap?

Their ability to be used outside of the bathroom Signup and view all the answers

What is the effect of soaps on the skin surface when used for cleansing?

They remove excess oil from the skin, leaving it dry and rough Signup and view all the answers

What is the purpose of massaging the cleansing cream or lotion onto the skin surface?

To loosen and suspend the grime and soil in the emulsion Signup and view all the answers

What determines the cleansing power of cleansing creams?

The concentration of the oily phase in their composition Signup and view all the answers

Study Notes

Creams

Definition: A solid or semisolid emulsion for skin application.
Classification: Functional, subjective, and physicochemical methods.

Functional Classification

Cleansing creams: Remove grime, sebum, dead cells, crusts, and makeup from the skin surface.
Moisturizing creams: Low oil content, easily spreadable, and quick to absorb.
Foundation creams: Oil-in-water emulsion, usually neutral pH.
Vanishing creams: Oil-in-water or water-in-oil emulsion, neutral to slightly acidic pH.
Hand and body creams: Low to medium oil content, easily spreadable, and may contain protective factors.

Cleansing Creams

Purpose: Remove grime, sebum, dead cells, crusts, and makeup from the skin surface.
Composition: Combination of water and oils, affecting skin cleansing efficiently and pleasantly.
Action: Spread onto the skin, massage, and wipe with a tissue or wool pad.
Cleansing power: Depends on the concentration of the oily phase in the composition.
Cold creams: Inclusion of borax imparts increased stability, and phase inversion may occur on the skin after application.

Cold Creams

Emulsifier: Beeswax-borax system, supplemented by non-ionic emulsifiers like sorbitan fatty acid esters.
Formula: W/O emulsion (1) or O/W emulsion (2), with varying percentages of beeswax, mineral oil, lanolin, and other ingredients.

Acidic Cleansing Creams

pH: Acidic, allowing for a more rapid return to normal skin pH.
Emulsifiers: Fewer options available, including glyceryl stearates, cetyl or stearyl alcohols, phosphated fatty alcohols, and fatty alcohol sulphates.

Night and Massage Creams

Designed to be left on the skin for several hours during the night.
May be stiff and "rich" due to their oil content.
May contain surfactants to improve penetration and suspension properties.

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Description

A lecture on skin care products focusing on the definition and classification of creams in cosmetic science. Learn about the different methods of classification.

Skin Care: Classification of Creams

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